Tractor-tread for wheels.



L. S. HACKNEY 61 F- G. HAAS.

/UGIe-S 8e6 L 'ITLtfg CCOP f 6812 8 5. CLCKTLBQ Rrdinand G. lfaas Patented Febr8, 1916.

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- is well adapted links of .one series UNITED STATES PAT N orries. p

LESLIE s. HACKNEY AND FERDINAND e. runs, or s r; PAUL, nmnnsora; SAID HaAs;

' assrenoa '10 SAID HACKNEY.

rnAc'roR-rREAn ron- WHEELS.

0 all whom it may concern: I

Be it known that we, LESLIE ,S. HACKNEY and FERDINAND G'. HAAS', citlzens of the United States, residing atSt. Paul, in the of Ramsey and State of Minnesota,

tion of a wheel supplied with our improved tractor tread; Fig. 2 is a plan view in detail illustrating portions of the tread detached from the Wheel and in extended position; Fig. 3 is a detail sectional view taken onthe 4 is a, longitudinal sectional view of one of the tread plates, and Fig. 5 is a bottom view of said plate.

Referring to the accompanying drawing,

we have used the reference numeral 10 to indicate a tractor wheel of the ordinary wellknown design having a flat rim 11 and radial spokes 12. Our improved tread, which for such wheels, consists of two or more series of tread plates 13, each series being arranged staggered relation to the other, around the periphery of the wheel 10; these plates are mounted upon the straps 14, which rest at intervals transversely on the rim 11 of the wheel 10. .The .tread plates 13 overlap the adjacent straps 14 and the ends of said plates are notched at 15 to conform to said adjacent straps. A lug 16, hinged on eachend of eachstrap l4, folds inwardly and forms a stop to pre-' vent lateral movement of the strap on the rim of the wheel. The straps 14 are equally spaced apart by a series of links 17, the

being pivotally attached to the lugs 16 at one side of the tread and the links of a second series being similarly attached to the lugs at the other side of the tread. A link-17 in each series, formed with an eye 18 and clevis 19, isprovided with a pin 20 for detachably securing the end links of the series together. Intermediate links at intervals within said series include coiled springs 21 between their ends, which nor- Specification of Letters Patent. Application filed June 12, 1913.. serial No. 773,255.

mally hold the tread snugly links 17 at each Patented Feb. 1916.

on the wheel but yield when the strapslet are disarranged the tilting of the tread plates. Detachable anti-creeping chains 22 are arranged at intervals within the rimof the wheel 10 extending from one lug 16- to the corresponding lug on the other end of the same strap. These chains engage the spokes of the wheel 10 and prevent said wheel from turning within the tread. Cuplike depressions 23 may be formed in the bearing surfaces of the tread plates 13, and lugs 24 may be secured on said surfaces to insure more eflicien-t contact between the road and the plates 13.

In operation, the inner faces of the tread plates 13 andstraps 14 form an even and continuous .bearing for the revolving wheel. The tread plates 13 'tilt as their ends engage the road sunface. At least three of said plates are atall times in contact with the earth and form a large. bearing surface,

which aids materially in the transmission of power. The tread is easily detached from the wheel by removing the pins 20 from the eyes 18 and clevises 19 and detaching the anti-creeping chains 22 from the'lugs 16. To apply the device, one end of the tread, is extended upon the ground and the rim of the wheel is placed thereon. Said end is then held upon the rim of the wheel which is revolved until the ends of the tread meet;

the lugs 16 having been turned inwardly at right angles to the plates 13 as said tread is applied to the rim. The series of connecting side of the tread are joined at their ends, after which the anti-creeping chains 22 are secured in position.

Having described our invention, what we claim as new and desire to secure by Letters Patent, is:

1. A tread, adapted to be placed upon a flat rimmed wheel, comprising a succession of staggered tread plates, a strap secured to each plate and'r'esting transversely on said rim and connecting members uniting the ends of said straps to join the same in an independent detachable series about the rim of the wheel. 1

- 2. The combination with the rim of a wheel, of asuccession of tread plates notched at their ends and'arranged in staggered relation around the periphery of the wheel, a strap secured to each plate and forming a mounting therefor and attaching elements connecting the straps, the notched ends of said plates being adapted to overlap and.

series of tread plates arranged in staggered relation around the periphery o fthe rim of said wheel, a strap forming a mounting for each plate and formed with lugs overlapping the edge of said rim, a seriesofjlinks on each side of the wheel connecting said lugs in succession and means, such as chains, extending between a plurality of said lugs and across said wheel for engaging the spokes thereof.

4. In a tractor tread for wheels, a plurality of tread plates arranged in staggered relation, straps secured to and forming a mounting for said plates, lugs on said straps and links connecting said lugs, a plurality Qopies of this patent may be obtained for five cents each, by addressing the Commissio of said links including springs adapted to a form a yielding attaching medium for said straps.

5. A tread, adapted to be placed upon the rim of an ordinary wheel, comprising a $110- cession of staggered tread plates, a mountingfor each plate restin transversely on said rim, means forlyieldmgly uniting the ends of said mountings to join the same in an endless series and means topievent the slipping of thetread upon said rim.

In testimony whereof, we have signed our names to this specification in the presence of two subscribing witnesses.

LESLIE HACKNEY.

' FERDINAND G. HAAS.

lVitnesses A. C. FRENCH, LOUIS JOHNSON.

ner of Patents,

Washington, D. O. p 

